Collaborator(s): Prof. Show-Shiow Tzeng
Age of Information（AoI）已成為評估即時狀態更新系統中新鮮度（freshness）的核心指標，特別適用於感測網路、物聯網（IoT）與即時監控等應用場景。與傳統以延遲或吞吐量為主的效能指標不同，AoI 同時刻畫了資訊更新的頻率與時效性，能更精確地反映接收端所掌握狀態資訊的有效程度。在多節點隨機接入環境中，媒體存取控制（MAC）機制對 AoI 的影響尤為關鍵。Slotted ALOHA 作為一種結構簡單且廣泛應用的隨機接入協定，其在時槽化傳輸下所引發的碰撞、重傳與封包成功率，會直接影響更新封包的到達過程，進而改變系統的 AoI 行為。因此，近年研究逐漸聚焦於在 Slotted ALOHA 架構下，分析不同存取機率、節點數量與封包產生策略對 AoI 的影響，並探討如何透過調整傳輸機制或引入跨層設計，以在維持系統穩定性的同時最小化平均 AoI 或峰值 AoI。這類研究不僅為隨機接入網路提供了新的效能最佳化視角，也為低功耗、即時性導向的 IoT 系統設計奠定了理論基礎。
| [J03] | S.S. Tzeng, Y.J. Lin, and S.W. Wang, "Probabilistic data generation based age-critical frameless ALOHA protocol in wireless networks," in Wireless Networks, vol. 31, no. 8, pp. 4693-4709. |
| [J02] | S.S. Tzeng, Y.J. Lin, and S.W. Wang, "Packet Error-Aware Threshold ALOHA protocol in wireless networks," in Wireless Personal Communications, vol. 142, no. 1, pp.21-38. |
| [J01] | S.S. Tzeng, Y.J. Lin, and S.W. Wang, "Age of Information in IoT Devices with Integrated Heterogeneous Sensors under Slotted ALOHA," in IEEE Sensors Journal, vol. 25, no. 11, pp. 20842-20853, 1 June1, 2025. |
| [P02] | S.S. Tzeng, Y.J. Lin, and S.W. Wang, "無線感測網路系統及方法," TW Patent, Number I897532, 2025-09-11. |
| [P01] | S.S. Tzeng, Y.J. Lin, and S.W. Wang, "基於封包錯誤感知閾值 ALOHA 協定之無線感測網路系統及方法," TW Patent, Number I896337, 2025-09-01. |
| [S03] | S.S. Tzeng, S.W. Wang, Y.J. Lin, and Y.C. Chiu, "Event-Aware Double-Threshold Aloha for Massive AIoT Networks," under review by IEEE ICCE-TW 2026, (Last update: 2026-01-23 ) |
| [S02] | S.S. Tzeng, Y.C. Chiu, S.W. Wang, and Y.J. Lin, "Age of Information Analysis of Heterogeneous Threshold-ALOHA Networks," under review by IEEE ICCE-TW 2026, (Last update: 2026-01-21 ) |
| [S01] | S.S. Tzeng, Y.J. Lin, and S.W. Wang, "Enhanced Mini-Slotted Threshold ALOHA for Age of Information and Energy Efficiency in Wireless Sensor Networks," under review by IEEE Sensors Journal, (Last update: 2026-02-14 ) |